Little more description would be appreciated. You want our help then invest some more time in writing us what it is you need help with.
Either way. So you capped some screenshots that you wanna see in game for placing on walls etc. is that it ya ?
And add these screenshots into your own .wad file.
The files must be either in .bmp, .tga, or .jpg format and be dividable by 16 so 128x128 or 256x64 8bit color format aka 256 colors.